A jury in Sanford, Florida has found George Zimmerman not guilty of murdering Trayvon Martin.

When a teenager's life is taken in cold blood, and there is no accountability for the man who killed him, nothing seems right in the world, but we cannot let these emotions alone rule.

Trayvon Martin / George Zimmerman

In these most challenging of times, we are called to act. There is work left to be done to achieve justice for Trayvon. The Department of Justice can still address the violation of Trayvon's most fundamental civil right — the right to life, and we are urging them to do so.

We continue to grieve the loss of Trayvon with his parents, his family, and all who loved him. Do not forget what brought us to this day.

George Zimmerman was arrested and charged because we would not back down when he was initially released. The Sanford Police Chief was removed from his post because we voiced our disbelief that he would overrule his detectives and block George Zimmerman's arrest.

And, perhaps most importantly, not a single state has passed a "stand your ground" law in 2013 — the first time in eight years — because we refuse to let the memory of Trayvon fade from the hearts and minds of America.

So, now we have a choice: We can be felled by our sorrows over the jury's decision, or we can turn our frustration into action. We can demand the Department of Justice address the travesties of this tragedy. We can take a step forward in our efforts to finally end racial profiling in America once and for all.